Dislocation creep in MgSiO3 perovskite at conditions of the Earth's uppermost lower mantle

  title={Dislocation creep in MgSiO3 perovskite at conditions of the Earth's uppermost lower mantle},
  author={Patrick Cordier and Tam{\'a}s Ung{\'a}r and Lehel Zsoldos and G{\'e}za Tichy},
Seismic anisotropy provides an important observational constraint on flow in the Earth's deep interior. The quantitative interpretation of anisotropy, however, requires knowledge of the slip geometry of the constitutive minerals that are responsible for producing rock fabrics. The Earth's lower mantle is mostly composed of (Mg, Fe)SiO3 perovskite, but as MgSiO3 perovskite is not stable at high temperature under ambient pressure, it has not been possible to investigate its mechanical behaviour… CONTINUE READING
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